Open source development process: Quoting Eric Raymond: "The pattern is simple and compelling. Where we have open-source
software, we have peer review and high reliability. Where we don't,
reliability suffers terribly.""Microsoft Windows machines are subject to frequent lockups,
generally require rebooting more than once a week, and need periodic
re-installation from scratch to eliminate problems such as registry
creep and DLL conflicts." Linux systems, on the other hand, "are so stable that many only go offline when brought down for hardware fixes and upgrades."

" Windows and Microsoft Update only do a handful of Microsoft
applications. With Linux, the OS updater application handles software
from other companies too. Huge plus for Linux. Huge."

Reliability: "The biggest and most unwelcome surprise in the survey was that Windows
Server 2003 downtime increased by 25% to nearly 9 hours of per server,
per year downtime compared to the results it achieved in Yankee Group's
2006 Global Server Reliability Survey." - Yankee group 2007-8 survey results.

In the absence of a patch, Microsoft recommends that affected users
block TCP ports 139 and 445 at the firewall. Windows users should also
block all SMB communications to and from the Internet to help prevent
attacks."